65 ILCS 5/11-11.2-2
For the purpose of carrying out the powers granted by this Division, the corporate authorities may employ such personnel and acquire by purchase or lease, such real or personal property as they deem necessary and may provide for the compensation of such personnel and other expenses in the annual appropriation ordinance through the use of corporate funds. Any municipality has the power to enter into contracts with any public or private agency undertaking such programs and authorize such agencies to act on behalf of the municipality. Such contracts may provide that the cost of all or a portion of such programs will be paid by the municipality. Any public or private agency acting under such contract shall report at least once each year to the corporate authorities of the municipality.
65 ILCS 5/11-11.2-2